Culverts, conduits that facilitate passage of water beneath roadways and other structures, represent important components of infrastructure systems, helping to drain, direct or divert surface water and prevent the disruption of roadways. Their efficient inspection and maintenance is thus critical to safe operation of Indiana’s transportation infras
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Sheth, A., & Sinfield, J. V. (2018). Synthesis Study: Overview of Readily Available Culvert Inspection Technologies (Report No. FHWA/IN/JTRP-2018/17). Purdue University. Joint Transportation Research Program. https://doi.org/10.5703/1288284316789
Sheth, Ananya and Joseph V. Sinfield. Synthesis Study: Overview of Readily Available Culvert Inspection Technologies. Report no. FHWA/IN/JTRP-2018/17. Purdue University. Joint Transportation Research Program, 2018. https://doi.org/10.5703/1288284316789.
Sheth, Ananya, and Joseph V. Sinfield Synthesis Study: Overview of Readily Available Culvert Inspection Technologies. Purdue University. Joint Transportation Research Program, 2018, Report no. FHWA/IN/JTRP-2018/17, ROSA P. https://doi.org/10.5703/1288284316789.
The Maine and New Hampshire Departments of Transportation studied the potential for green infrastructure techniques to protect Route 209 in Phippsburg, ME and Route 1B in Portsmouth, NH from coastal flooding. Maine results show it is possible to extend the time before a conventional gray infrastructure solution (sheet pile wall or riprap) becomes n
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Gates, J., Mallette, T., Merrill, S., & Ballestero, T. P. (2018). Two Northeastern DOTs Consider Green Infrastructure Techniques for Coastal Highway Resilience: A Joint Study with Divergent Outcomes (Report No. FHWA-HEP-18-088). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/58162
Gates, Judy, Timothy Mallette, Samuel Merrill, and Thomas P. Ballestero. Two Northeastern DOTs Consider Green Infrastructure Techniques for Coastal Highway Resilience: A Joint Study with Divergent Outcomes. Report no. FHWA-HEP-18-088. United States. Federal Highway Administration, 2018. https://rosap.ntl.bts.gov/view/dot/58162.
Gates, Judy, et al. Two Northeastern DOTs Consider Green Infrastructure Techniques for Coastal Highway Resilience: A Joint Study with Divergent Outcomes. United States. Federal Highway Administration, 2018, Report no. FHWA-HEP-18-088, ROSA P. https://rosap.ntl.bts.gov/view/dot/58162.
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2018-08-01
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Both States are using the Highway Safety Improvement Program (HSIP) to target pedestrian safety projects. TDOT will use at least 10 percent of its HSIP funding to counter an increasing number of serious and fatal crashes involving pedestrians. CTDOT has taken a more programmatic approach, but has easily surpassed a 10-percent threshold in recent ye
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United States. Department of Transportation. Federal Highway Administration. Office of Safety (2018). Connecticut & Tennessee Fund Pedestrian Safety: DOTs Use Highway Safety Improvement Program Funding to Provide Exemplary Focus on Pedestrian Safety (Report No. FHWA-SA-18-055). United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/49596
United States. Department of Transportation. Federal Highway Administration. Office of Safety. Connecticut & Tennessee Fund Pedestrian Safety: DOTs Use Highway Safety Improvement Program Funding to Provide Exemplary Focus on Pedestrian Safety. Report no. FHWA-SA-18-055. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2018. https://rosap.ntl.bts.gov/view/dot/49596.
United States. Department of Transportation. Federal Highway Administration. Office of Safety Connecticut & Tennessee Fund Pedestrian Safety: DOTs Use Highway Safety Improvement Program Funding to Provide Exemplary Focus on Pedestrian Safety. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2018, Report no. FHWA-SA-18-055, ROSA P. https://rosap.ntl.bts.gov/view/dot/49596.
To inform the development of an implementation guide, the Federal Highway Administration (FHWA) conducted four regional peer exchanges in Spring 2018 on nature-based solutions that improve coastal highway resilience. This peer exchange summary provides a synthesis of the key examples of nature-based solutions and recommendations for successful plan
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Cherry, C., Dix, B., Asam, S., Webb, B. M., & Douglass, S. L. (2018). Peer Exchange Summary Report: Nature-Based Solutions for Coastal Highway Resilience (Report No. FHWA-HEP-18-XXX). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/43620
Cherry, Charlotte, Brenda Dix, Susan Asam, Bret M. Webb, and Scott L. Douglass. Peer Exchange Summary Report: Nature-Based Solutions for Coastal Highway Resilience. Report no. FHWA-HEP-18-XXX. United States. Federal Highway Administration, 2018. https://rosap.ntl.bts.gov/view/dot/43620.
Cherry, Charlotte, et al. Peer Exchange Summary Report: Nature-Based Solutions for Coastal Highway Resilience. United States. Federal Highway Administration, 2018, Report no. FHWA-HEP-18-XXX, ROSA P. https://rosap.ntl.bts.gov/view/dot/43620.
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2018-08-01
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When contemplating an approach to understand the myriad of complex and interwoven factors and circumstances involved in speeding-related issues, practitioners sometimes ask "Where do I even start?" and "Which data are the most trustworthy?" State crash reports use a variety of categories to describe speeding-related crashes: "exceeded speed limit,"
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United States. Department of Transportation. Federal Highway Administration. Office of Safety (2018). Improving Speed Management Using a Systemic Safety Approach (Report No. FHWA-SA-18-051). United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/49592
United States. Department of Transportation. Federal Highway Administration. Office of Safety. Improving Speed Management Using a Systemic Safety Approach. Report no. FHWA-SA-18-051. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2018. https://rosap.ntl.bts.gov/view/dot/49592.
United States. Department of Transportation. Federal Highway Administration. Office of Safety Improving Speed Management Using a Systemic Safety Approach. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2018, Report no. FHWA-SA-18-051, ROSA P. https://rosap.ntl.bts.gov/view/dot/49592.
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2018-08-01
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Rectangular Rapid-Flashing Beacons (RRFBs) is one of MaineDOT’s most common pedestrian countermeasures. In addition to installing RRFBs through their typical project development process, the Department has reached out to communities to become partners in the installation and maintenance of the RRFB. MaineDOT created a single procurement-only contra
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United States. Department of Transportation. Federal Highway Administration. Office of Safety (2018). Rectangular Rapid-Flashing Beacons in Maine: A Simple Approach to Promote this Safety Countermeasure (Report No. FHWA-SA-18-054). United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/49595
United States. Department of Transportation. Federal Highway Administration. Office of Safety. Rectangular Rapid-Flashing Beacons in Maine: A Simple Approach to Promote this Safety Countermeasure. Report no. FHWA-SA-18-054. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2018. https://rosap.ntl.bts.gov/view/dot/49595.
United States. Department of Transportation. Federal Highway Administration. Office of Safety Rectangular Rapid-Flashing Beacons in Maine: A Simple Approach to Promote this Safety Countermeasure. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2018, Report no. FHWA-SA-18-054, ROSA P. https://rosap.ntl.bts.gov/view/dot/49595.
This report provides the current state of congestion and reliability in 52 of the largest metropolitan areas in the United States. It also highlights relevant successful operational strategies and performance management approaches implemented by state and local transportation agencies. The report concludes with a brief discussion of the new travel
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United States. Federal Highway Administration (2018). 2017 Urban Congestion Trends: Measuring, Managing, and Improving Operations in the 21st Century (Report No. FHWA-HOP-18-025). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/43529
United States. Federal Highway Administration. 2017 Urban Congestion Trends: Measuring, Managing, and Improving Operations in the 21st Century. Report no. FHWA-HOP-18-025. United States. Federal Highway Administration, 2018. https://rosap.ntl.bts.gov/view/dot/43529.
United States. Federal Highway Administration 2017 Urban Congestion Trends: Measuring, Managing, and Improving Operations in the 21st Century. United States. Federal Highway Administration, 2018, Report no. FHWA-HOP-18-025, ROSA P. https://rosap.ntl.bts.gov/view/dot/43529.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2018-08-01
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On a monthly basis, each State is required to report to the Federal Highway Administration (FHWA), the amount of gallons taxed by that state. This data is analyzed and compiled by FHWA staff. The data on the amount of on-highway fuel use for each State is then used to attribute federal revenue to each State. Yearly, the FHWA, Office of Policy, prov
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2018). Monthly Motor Fuel Reported by States: August 2018 (Report No. FHWA-PL-18-038). United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/50219
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Monthly Motor Fuel Reported by States: August 2018. Report no. FHWA-PL-18-038. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2018. https://rosap.ntl.bts.gov/view/dot/50219.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Monthly Motor Fuel Reported by States: August 2018. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2018, Report no. FHWA-PL-18-038, ROSA P. https://rosap.ntl.bts.gov/view/dot/50219.
As the world’s second-most widely used material behind water, concrete is a core ingredient of American infrastructure, including its use to build roads and bridges on the National Highway System. Concrete, due to its long service life, has a low environmental cost; however, its major component, ordinary portland cement (OPC), in its manufacturing
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United States. Federal Highway Administration (2018). Alternative Cementitious Materials in Transportation : Sustainable, Durable Substitutes for Portland Cement : [fact sheet] (Report No. FHWA-HRT-18-031;HRTM-30/08-18(WEB)E). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/37559
United States. Federal Highway Administration. Alternative Cementitious Materials in Transportation : Sustainable, Durable Substitutes for Portland Cement : [fact sheet]. Report no. FHWA-HRT-18-031;HRTM-30/08-18(WEB)E. United States. Federal Highway Administration, 2018. https://rosap.ntl.bts.gov/view/dot/37559.
United States. Federal Highway Administration Alternative Cementitious Materials in Transportation : Sustainable, Durable Substitutes for Portland Cement : [fact sheet]. United States. Federal Highway Administration, 2018, Report no. FHWA-HRT-18-031;HRTM-30/08-18(WEB)E, ROSA P. https://rosap.ntl.bts.gov/view/dot/37559.
2018-08-01
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National Household Travel Survey (NHTS)
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Online shopping is a thriving market, reflecting the increasing development of information technology and convenience of electronic commerce over the last decade. In an effort to track trends associated with increased access to technology, the National Household Travel Survey (NHTS) began to query respondents ages 16 and older on how many times the
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United States. Federal Highway Administration (2018). FHWA NHTS Brief: Changes in Online Shopping Trends: 2017 National Household Travel Survey. United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/58744
United States. Federal Highway Administration. FHWA NHTS Brief: Changes in Online Shopping Trends: 2017 National Household Travel Survey. United States. Federal Highway Administration, 2018. https://rosap.ntl.bts.gov/view/dot/58744.
United States. Federal Highway Administration FHWA NHTS Brief: Changes in Online Shopping Trends: 2017 National Household Travel Survey. United States. Federal Highway Administration, 2018, ROSA P. https://rosap.ntl.bts.gov/view/dot/58744.
An increasing number of regional and local transportation agencies across the country are adopting transportation safety plans with a vision to eliminate traffic fatalities. This document provides references to key information for metropolitan planning organizations and local communities to understand the safety planning process and develop their o
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Tang, E., Peach, K., DeFisher, J., & Eccles, K. A. (2018). Transportation Safety Planning and the Zero Deaths Vision: A Guide for Metropolitan Planning Organizations and Local Communities (Report No. FHWA-SA-18-024). United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/43671
Tang, Eric, Kara Peach, Joshua DeFisher, and Kimberly A. Eccles. Transportation Safety Planning and the Zero Deaths Vision: A Guide for Metropolitan Planning Organizations and Local Communities. Report no. FHWA-SA-18-024. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2018. https://rosap.ntl.bts.gov/view/dot/43671.
Tang, Eric, et al. Transportation Safety Planning and the Zero Deaths Vision: A Guide for Metropolitan Planning Organizations and Local Communities. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2018, Report no. FHWA-SA-18-024, ROSA P. https://rosap.ntl.bts.gov/view/dot/43671.
2018-08-01
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FHWA Highway History Website Articles
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Monograph on the creation of the National Old Trails Road Association.
Weingroff, R. F. (2018). The National Old Trails Road. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/68599
Weingroff, Richard F.. The National Old Trails Road. United States. Department of Transportation. Federal Highway Administration, 2018. https://rosap.ntl.bts.gov/view/dot/68599.
Weingroff, Richard F. The National Old Trails Road. United States. Department of Transportation. Federal Highway Administration, 2018, ROSA P. https://rosap.ntl.bts.gov/view/dot/68599.
The Wyoming Department of Transportation’s (WYDOT) Connected Vehicle (CV) Pilot Deployment Program is intended to develop a suite of applications that utilize vehicle to infrastructure (V2I) and vehicle to vehicle (V2V) communication technology to reduce the impact of adverse weather on truck travel in the I-80 corridor. These applications support
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Kitchener, F., Young, R., Ahmed, M., Yang, G., Gaweesh, S., Gopalakrishna, D., Garcia, V., Ragan, A., English, T., Zumpf, S., Serulle, N. U., & Hsu, E. (2018). Connected Vehicle Pilot Deployment Program Phase 2, Performance Measurement and Evaluation Support Plan-ICF/Wyoming (Report No. FHWA-JPO-16-290). United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office. https://rosap.ntl.bts.gov/view/dot/31400
Kitchener, Fred, Rhonda Young, Mohamed Ahmed, Guangchuan Yang, Sherif Gaweesh, Deepak Gopalakrishna, and Vince Garcia, et al.. Connected Vehicle Pilot Deployment Program Phase 2, Performance Measurement and Evaluation Support Plan-ICF/Wyoming. Report no. FHWA-JPO-16-290. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2018. https://rosap.ntl.bts.gov/view/dot/31400.
Kitchener, Fred, et al. Connected Vehicle Pilot Deployment Program Phase 2, Performance Measurement and Evaluation Support Plan-ICF/Wyoming. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2018, Report no. FHWA-JPO-16-290, ROSA P. https://rosap.ntl.bts.gov/view/dot/31400.
United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office
2018-07-26
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Each year, rural roadways experience a greater number of fatal crashes than urban roadways. In 2015, there were more than 6.2 million traffic crashes in the United States, in which 35,092 people were killed. Of this staggering number, rural fatalities accounted for 49 percent— despite estimates that only 19 percent of the U.S. population live in ru
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United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office (2018). Intelligent Transportation Systems (ITS): Benefits for Rural Communities. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office. https://rosap.ntl.bts.gov/view/dot/65745
United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office. Intelligent Transportation Systems (ITS): Benefits for Rural Communities. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2018. https://rosap.ntl.bts.gov/view/dot/65745.
United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office Intelligent Transportation Systems (ITS): Benefits for Rural Communities. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2018, ROSA P. https://rosap.ntl.bts.gov/view/dot/65745.
United States. Federal Highway Administration. Office of Planning, Environment, and Realty
2018-07-26
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This digest shares the latest information from a range of Federal and non-Federal sources, addressing transportation and its relationship to the human environment. Through this information exchange, FHWA hopes to foster dialogue at all levels and continue to further the state of the practice on these important topics in support of safety; infrastru
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United States. Federal Highway Administration. Office of Planning, Environment, and Realty (2018). Human Environment Digest: July 26, 2018. United States. Federal Highway Administration. Office of Planning, Environment, and Realty. https://rosap.ntl.bts.gov/view/dot/55015
United States. Federal Highway Administration. Office of Planning, Environment, and Realty. Human Environment Digest: July 26, 2018. United States. Federal Highway Administration. Office of Planning, Environment, and Realty, 2018. https://rosap.ntl.bts.gov/view/dot/55015.
United States. Federal Highway Administration. Office of Planning, Environment, and Realty Human Environment Digest: July 26, 2018. United States. Federal Highway Administration. Office of Planning, Environment, and Realty, 2018, ROSA P. https://rosap.ntl.bts.gov/view/dot/55015.
The purpose of this analysis, modeling, and simulation (AMS) plan is to provide a well-defined and unambiguous set of steps to be followed for modeling, simulating, and evaluating the mobility and environmental impacts of the pilot deployment as outlined in the refined evaluation plan for New York City, created in Task 2 of this project. The plan d
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Morgan, A., Dowling, R. G., Morrison, G., Burris, M. W., & Balke, K. N. (2018). Connected Vehicle Pilot Deployment Program Independent Evaluation: Analysis, Modeling, and Simulation Plan-New York City (Report No. FHWA-JPO-18-664). United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office. https://rosap.ntl.bts.gov/view/dot/40150
Morgan, Abigail, Richard G. Dowling, Geoff Morrison, Mark W. Burris, and Kevin N. Balke. Connected Vehicle Pilot Deployment Program Independent Evaluation: Analysis, Modeling, and Simulation Plan-New York City. Report no. FHWA-JPO-18-664. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2018. https://rosap.ntl.bts.gov/view/dot/40150.
Morgan, Abigail, et al. Connected Vehicle Pilot Deployment Program Independent Evaluation: Analysis, Modeling, and Simulation Plan-New York City. United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office, 2018, Report no. FHWA-JPO-18-664, ROSA P. https://rosap.ntl.bts.gov/view/dot/40150.
United States. Federal Highway Administration. Office of Planning, Environment, and Realty
2018-07-12
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This digest shares the latest information from a range of Federal and non-Federal sources, addressing transportation and its relationship to the human environment. Through this information exchange, FHWA hopes to foster dialogue at all levels and continue to further the state of the practice on these important topics in support of safety; infrastru
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United States. Federal Highway Administration. Office of Planning, Environment, and Realty (2018). Human Environment Digest: July 12, 2018. United States. Federal Highway Administration. Office of Planning, Environment, and Realty. https://rosap.ntl.bts.gov/view/dot/55016
United States. Federal Highway Administration. Office of Planning, Environment, and Realty. Human Environment Digest: July 12, 2018. United States. Federal Highway Administration. Office of Planning, Environment, and Realty, 2018. https://rosap.ntl.bts.gov/view/dot/55016.
United States. Federal Highway Administration. Office of Planning, Environment, and Realty Human Environment Digest: July 12, 2018. United States. Federal Highway Administration. Office of Planning, Environment, and Realty, 2018, ROSA P. https://rosap.ntl.bts.gov/view/dot/55016.
The FHWA Business Process and Data Quality Checklist report is a resource for state Departments of Transportation to improve the quality and timeliness of HPMS submittals. The checklist will help agencies implement strategies to marshal internal resources and work with Federal-aid partners effectively and efficiently.
CDM Smith, & Gordon Proctor & Associates (2018). Developing New Business and Operational Guidance Ensuring Timely and Quality Highway Performance Monitoring System Data Submittal from State Highway Agencies: Task 4 and Task 5 Reports: Efficient Business Processes for Data Collection and Reporting and Self-Certifying Business Model Checklist. United States. Federal Highway Administration. Office of Policy and Governmental Affairs. https://rosap.ntl.bts.gov/view/dot/57300
CDM Smith and Gordon Proctor & Associates. Developing New Business and Operational Guidance Ensuring Timely and Quality Highway Performance Monitoring System Data Submittal from State Highway Agencies: Task 4 and Task 5 Reports: Efficient Business Processes for Data Collection and Reporting and Self-Certifying Business Model Checklist. United States. Federal Highway Administration. Office of Policy and Governmental Affairs, 2018. https://rosap.ntl.bts.gov/view/dot/57300.
CDM Smith, et al. Developing New Business and Operational Guidance Ensuring Timely and Quality Highway Performance Monitoring System Data Submittal from State Highway Agencies: Task 4 and Task 5 Reports: Efficient Business Processes for Data Collection and Reporting and Self-Certifying Business Model Checklist. United States. Federal Highway Administration. Office of Policy and Governmental Affairs, 2018, ROSA P. https://rosap.ntl.bts.gov/view/dot/57300.
2018-07-08
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FHWA Highway History Website Articles
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The idea of a Department of Transportation (DOT) has a long history, but President Johnson made it a reality in 1966. To be the chief public advocate for the idea, he selected Boyd, then 44 years old. As chief advocate, Boyd promoted the proposal with industry groups, the press, and especially on Capitol Hill. President Johnson signed the Departmen
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Weingroff, R. F. (2018). In Memoriam: Alan S. Boyd. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/75249
Weingroff, Richard F.. In Memoriam: Alan S. Boyd. United States. Department of Transportation. Federal Highway Administration, 2018. https://rosap.ntl.bts.gov/view/dot/75249.
Weingroff, Richard F. In Memoriam: Alan S. Boyd. United States. Department of Transportation. Federal Highway Administration, 2018, ROSA P. https://rosap.ntl.bts.gov/view/dot/75249.
The overall objectives of this study were to (1) identify and explore alternative safety data sources and analysis perspectives and (2) demonstrate the potential utility of these alternative approaches in increasing understanding of precipitating events and predisposing factors for crashes occurring on horizontal curves and at unsignalized intersec
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Porter, R. J., Himes, S., Musunuru, A., Le, T., Eccles, K., Peach, K., Tasic, I., Zlatkovic, M., Tatineni, K., & Duffy, B. (2018). Understanding the Causative, Precipitating, and Predisposing Factors in Rural Two-Lane Crashes (Report No. FHWA-HRT-17-079;HRDS-20/07-18(WEB)E). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/37530
Porter, Richard J., Scott Himes, Anusha Musunuru, Thanh Le, Kimberly Eccles, Kara Peach, Ivana Tasic, Milan Zlatkovic, Kailash Tatineni, and Brendan Duffy. Understanding the Causative, Precipitating, and Predisposing Factors in Rural Two-Lane Crashes. Report no. FHWA-HRT-17-079;HRDS-20/07-18(WEB)E. United States. Federal Highway Administration, 2018. https://rosap.ntl.bts.gov/view/dot/37530.
Porter, Richard J., et al. Understanding the Causative, Precipitating, and Predisposing Factors in Rural Two-Lane Crashes. United States. Federal Highway Administration, 2018, Report no. FHWA-HRT-17-079;HRDS-20/07-18(WEB)E, ROSA P. https://rosap.ntl.bts.gov/view/dot/37530.
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